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"This HowTo describes the implementation of Nginx with php5
support (through FastCGI). The fast-cgi process will be initiated
via spawn-fcgi.

"What for? Nginx is a great replacement of Apache with very low
memory footprint and contrary to Lighttpd, doesn't suffer from
memory leak over time. You can then use all the memory left to
unleash the power of mysql for instance by increasing the default
query cache..."